TY - JOUR AU - Johnson, Donna D; Wagner, Carol L; Hulsey, Thomas C; McNeil, Rebecca B; Ebeling, Myla; Hollis, Bruce W TI - Vitamin D Deficiency and Insufficiency is Common during Pregnancy SN - 0735-1631 SN - 1098-8785 PY - 2011 JO - Am J Perinatol JF - American Journal of Perinatology LA - EN VL - 28 IS - 01 SP - 007 EP - 012 ET - 2010/07/16 DA - 2010/12/29 DO - 10.1055/s-0030-1262505 UR - http://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0030-1262505 ER -